Skip to main content

SudaTex-G Side Effects

Generic name: guaifenesin / pseudoephedrine

Medically reviewed by Last updated on Apr 23, 2024.

Note: This document contains side effect information about guaifenesin / pseudoephedrine. Some dosage forms listed on this page may not apply to the brand name SudaTex-G.

Applies to guaifenesin / pseudoephedrine: oral capsule, oral tablet, oral tablet extended release 12 hour.

Serious side effects of SudaTex-G

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

Other side effects of SudaTex-G

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

For Healthcare Professionals

Applies to guaifenesin/pseudoephedrine: oral capsule, oral capsule extended release, oral liquid, oral syrup, oral tablet, oral tablet chewable, oral tablet extended release.


Frequency not reported: Tachycardia, palpitations, other cardiac dysrhythmias, hypertension[Ref]

Nervous system

Frequency not reported: Headache, dizziness, tremor, excitability[Ref]


Frequency not reported: Irritability, tolerance and dependence (with prolonged pseudoephedrine administration), anxiety, restlessness, insomnia, hallucinations (particularly in children), paranoid delusions, sleep disturbance[Ref]


Frequency not reported: Hypersensitivity reactions, cross-sensitivity with other sympathomimetics[Ref]


Frequency not reported: Difficulty in micturition (including urinary retention)[Ref]


Frequency not reported: Skin reactions (including rash, sweating), severe skin reactions including acute generalized exanthematous pustulosis (AGEP)[Ref]


Frequency not reported: Nausea, vomiting, gastrointestinal discomfort, dry mouth[Ref]


Frequency not reported: Muscular weakness[Ref]


Frequency not reported: Thirst[Ref]


1. Cerner Multum, Inc. "UK Summary of Product Characteristics."

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.